Valve.



C. 0. NIIILSSM.

VALVE.

APPLICATION FILED www. I9I4.

Mtentd Apr.. 13, 19115.

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Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed .Tilly 10, 1914. Serial No. 850,154.

T all 'whom it may concern Be it known that I, CARL 0. NILssoN, acitizen of the United States, and a resident of Ravenswood, in thecounty of Jackson and State of West Virginia, have made certain new anduseful improvements in Valves, of which the following is aspecification.

My invention is an improvement in valves, and has for its object toprovide a valve of the character specified, especially adapted for useas an exhaust valve in explosion engines, and ,especially of that typeusing the puppet type of valve.

In the drawings: Figure l is a front view of the improved valve, andFig. 2 is a longitudinal section.

ln the present embodiment of the invention the valve casing or cage 1 ofapproximately cylindrical form is provided with a lateral opening 2, andthe inner end of the casing is open as shown, and is beveled internally,as indicated at 3, to form a seat for the valve t. The inner surface ofthe valve eis beveled, as shown at 5, to it the surface 3, and the saidvalve is held between lock nuts 6 and 7 on a valve stem 8.

The outer end of the casing or cage is provided with an internallythreaded opening 9, and a tube 10 is threaded into the opening, the tubebeing concentric with the stem but of greater diameter, and extendingfrom the outer end of the casing to near the inner end. f1 second tube11 is arranged within the tube 1 0 and concentric therewith, the tube 11encircling the stem loosely as shown.

Bushings 12 and 13 are arranged between the tubes 10 and 11, eachbushing having an annular body engaging between the tubes, and having athreaded engagement with the inner tube, and an annular rib at its innerend fitting against the adjacent end of the tube 10. The tubes are thusheld in rigid position and in spaced relation, and an oil tube 14extends through the bushing 12 and between the tubes 10y and 11 to apoint near the bushing 13, where the said oil tube has a lateral bendwhich engages an opening in the tube 11. Thus oil is furnished forlubricaing the stem with respect to the inner tu e.

A second tube l of larger size is passed through the outer end of thecasing outside of the tube and the tube 15 extends to near the bushing13. Here an elbow 16 has one of its ends threaded into an opening in theouter tube 10, and the other end engages the adjacent end of the tube15. The tube is the water outlet tube, and the space or annular chamberbetween the two tubes 10 and 11 is designed to receive water.

The casing 1 is provided with a radial passage 17 near its outer end,registering with an opening in the outer tube 11 and leading to thespace between the tubes 10 and 11, and this is the inlet for the water,the tube 15 being the outlet. The water enters by way of the passage 17to the annular chamber between the tubes 10 and 11, and filling thisspace passes out at the elbow 16 and by way of the tube 15 to the sourceof supply. j

The lower end of the stem 8 is provided with a transverse opening 1S forengagement by a spring, and the lower end of the casing 1 is recessedaround the opening 9, as indicated at 19, and a lock nut or ring 20 isthreaded on to the outer tube at its recess, for locking the outer tubein place. The casing is also provided with a marginal flange 21 at itslower end, for connection with the cylinder of the engine.

The portion of the valve stern adjacent to the cylinder is thussurrounded by cooling water, so that the heat from the valve will notheat the stem and the tube 11, to burn the oil that issupplied by way ofthe tube 14- to lubricate the stem. By supplying the oil in the mannershown, that is by way of the tube 14, which opens near the upper end ofthe bearing tube 11. the lubricant will lubricate practically the entirelength of the stem, and not merely that portion adjacent to thecylinder.

The greatest diameter of the bushing 12 is less than the least diameterof the opening 9 through which the tubes are passed, so that the tubes10 and 11 may be assembled before they are placed.

The' usual cast iron guide for the valve stem may be omitted, and it wasthis guide that heated the oil. The improvement consists in applying ajacket to the stem for guiding the same, and arranging the jacket insuch manner that a cooling fluid may be circulated through the same. Itwill be noticed that the outer end of the radial passage 17 isinternally threaded, for engagement by a supply pipe or the like.

1 c aim:

1. In combination with the valve casing and the valve coperating withthe outer end thereof, the stem to which the valve is near the outermostbushing, said oil Vtube communicating with the space between the stemand the inner tube near the outermost bushing, the casing having aradial inlet leading to the space at thelower end of the casing, and apipe leading through the space between the casing and the outer tubenearl the outermost bushing and extending longitudinally of the casingthrough the inner end thereof.

2. The combination with the valve casing and the valve coperatingtherewith, the

stem to which the valve is connected, said casing having an opening atits lower end through which the stem passes, and a guide for'the stem,said guide comprising a pair of co-aXial tubes spaced apart from eachother,

the inner tube fitting the stem, means at the I ends of the tubes forconnecting the same and for closing the space between the tubes, inletand outlet pipes for supplying a cooling fluid to the space between thetubes, and an oil tube between the tubes and communicating with thespace between the stem and the inner tube nea-r the outer ends of thetubes.

3. The combination with the valve casing and the valve coperatingtherewith, the stem to which the valve is connected, said casing havingan opening at its lower end through which the stem passes, and a guidefor the stem, said guide comprising a pair of co-aXial tubes spacedapart from each other, the inner tube fitting the stem, means at theends of the tubes for connectingthe same and for closing the spacebetween the tubes, means for permitting the circulation of a coolingfluid through the space between the tubes, and means for supplying oilto the inner tube near the upper end thereof.

CARL OSCAR NILSSON. Witnesses:

C. T. KNENEAM, H. F. WILLIAMS.

C'opies of ythis patent may be obtained for five cents each, byaddressing the "Commissioner of Patents, Washington, D. C.

